TechCrunch has a list of passwords that can’t even be used with Twitter. Using these generic easy to guess passwords is an invitation to being hacked. That’s why we recommend you always use a stronger password.
It’s easy to write a brute force attack script that will simply try the most popular passwords, that’s why websites have had to come up with countermeasures such as this.
So use a password generator that gives you a secure and memorable password that isn’t banned.